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3 years ago

In the chemical formula 3nh3, how many atoms of hydrogen (h) are there? 3 6 9 11

Chemistry

2 answers:

ANTONII [103]3 years ago

7 0

Your answer is 3! Hope you get a good grade :)♥

Sergeeva-Olga [200]3 years ago

5 0

Answer: There are 9 hydrogen atoms in the given chemical formula.

Explanation:

We are given a chemical formula of ammonia which is $NH_3$

This molecule is formed by the combination of hydrogen and nitrogen atoms.

In 1 mole of ammonia, 1 atom of nitrogen is there and 3 atoms of hydrogen is there.

We are given:

Moles of ammonia = 3

So, 3 atoms of nitrogen is there and 9 atoms of hydrogen is there.

Hence, there are 9 hydrogen atoms in the given chemical formula.

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2 years ago

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Please help, with step by step work

natali 33 [55]

$\qquad$ ☀️ $\pink{\bf{ {Answer = \: \: 85.57g }}}$

Molar mass of $\bf Cu_2O$

$\qquad$ $\twoheadrightarrow\sf 63.546 \times 2 +16$

$\qquad$ $\pink{\twoheadrightarrow\bf 143.092 g}$

As we know–

1 mol = $\bf 6.02×10^{23}$ formula units

1 mol $\bf Cu_2O$ = 143.092 g = $\bf 6.02×10^{23}$ formula units

Henceforth –

$\bf 3.60×10^{23}$ formula units $\bf Cu_2O$ –

$\qquad$ $\sf :\implies \dfrac{143.092 \times3.60×10^{23 }}{6.02×10^{23}}$

$\qquad$ $\sf :\implies \dfrac{143.092 \times3.60×\cancel{10^{23 }}}{6.02×\cancel{10^{23}}}$

$\qquad$ $\pink{:\implies\bf 85.57 g}$

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2 years ago

1. If the atomic number of an element is 6 and its mass number is 14, how many neutrons are contained in the nucleus?

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You can find the neutrons by subtracting the mass by the atomic number. 14-6=8 neutrons

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